<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>学生信息</title>
</head>
<body>
<h1>一级标题</h1>
<h2>二级标题</h2>
<h3>三级标题</h3>
<table>
<tr>
<td>学生姓名</td>
<td>学生学号</td>
</tr>
</table>
</body>
</html>